not forming an essential part of a thing or arising or originating from the outside; "extrinsic evidence"; "an extrinsic feature of the new building"; "that style is something extrinsic to the subject"; "looking for extrinsic aid"

not consisting of matter; "immaterial apparitions"; "ghosts and other immaterial entities"

(often followed by `to') lacking importance; not mattering one way or the other; "whether you choose to do it or not is a matter that is quite immaterial (or indifferent)"; "what others think is altogether indifferent to him"

of no importance or relevance especially to a law case; "an objection that is immaterial after the fact"